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Manual merge

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unknown
2004-02-19 01:12:49 -08:00
parent f4353d48cc
commit fd98ed36c6
3 changed files with 224 additions and 138 deletions
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85
sql/item.h
View File

@ -126,8 +126,8 @@ public:
top AND/OR ctructure of WHERE clause to protect it of
optimisation changes in prepared statements
*/
Item(THD *thd, Item &item);
virtual ~Item() { name=0; cleanup(); } /*lint -e1509 */
Item(THD *thd, Item *item);
virtual ~Item() { name=0; } /*lint -e1509 */
void set_name(const char *str,uint length, CHARSET_INFO *cs);
void init_make_field(Send_field *tmp_field,enum enum_field_types type);
virtual void cleanup() { fixed=0; }
@ -206,6 +206,7 @@ public:
virtual Item *get_tmp_table_item(THD *thd) { return copy_or_same(thd); }
CHARSET_INFO *default_charset() const;
virtual CHARSET_INFO *compare_collation() { return NULL; }
virtual bool walk(Item_processor processor, byte *arg)
{
@ -239,6 +240,11 @@ public:
/* Used in sql_select.cc:eliminate_not_funcs() */
virtual Item *neg_transformer() { return NULL; }
void delete_self()
{
cleanup();
delete this;
}
};
@ -304,7 +310,10 @@ public:
inline void make_field(Send_field *field)
{
this_item()->make_field(field);
Item *it= this_item();
it->set_name(m_name.str, m_name.length, system_charset_info);
it->make_field(field);
}
inline Item_result result_type() const
@ -326,6 +335,11 @@ public:
{
str->append(m_name.str, m_name.length);
}
inline bool send(Protocol *protocol, String *str)
{
return this_item()->send(protocol, str);
}
};
@ -339,7 +353,7 @@ public:
st_select_lex *depended_from;
Item_ident(const char *db_name_par,const char *table_name_par,
const char *field_name_par);
Item_ident(THD *thd, Item_ident &item);
Item_ident(THD *thd, Item_ident *item);
const char *full_name() const;
bool remove_dependence_processor(byte * arg);
@ -362,7 +376,7 @@ public:
item_equal(0)
{ collation.set(DERIVATION_IMPLICIT); }
// Constructor need to process subselect with temporary tables (see Item)
Item_field(THD *thd, Item_field &item);
Item_field(THD *thd, Item_field *item);
Item_field(Field *field);
enum Type type() const { return FIELD_ITEM; }
bool eq(const Item *item, bool binary_cmp) const;
@ -393,6 +407,7 @@ public:
bool get_time(TIME *ltime);
bool is_null() { return field->is_null(); }
Item *get_tmp_table_item(THD *thd);
void cleanup();
Item_equal *find_item_equal(COND_EQUAL *cond_equal);
Item *equal_fields_propagator(byte *arg);
bool replace_equal_field_processor(byte *arg);
@ -583,7 +598,7 @@ public:
CHARSET_INFO *cs, Derivation dv= DERIVATION_COERCIBLE)
{
collation.set(cs, dv);
str_value.set(str,length,cs);
str_value.set_or_copy_aligned(str,length,cs);
/*
We have to have a different max_length than 'length' here to
ensure that we get the right length if we do use the item
@ -599,12 +614,11 @@ public:
CHARSET_INFO *cs, Derivation dv= DERIVATION_COERCIBLE)
{
collation.set(cs, dv);
str_value.set(str,length,cs);
str_value.set_or_copy_aligned(str,length,cs);
max_length= str_value.numchars()*cs->mbmaxlen;
set_name(name_par,0,cs);
decimals=NOT_FIXED_DEC;
}
~Item_string() {}
enum Type type() const { return STRING_ITEM; }
double val()
{
@ -671,7 +685,6 @@ class Item_varbinary :public Item
{
public:
Item_varbinary(const char *str,uint str_length);
~Item_varbinary() {}
enum Type type() const { return VARBIN_ITEM; }
double val() { return (double) Item_varbinary::val_int(); }
longlong val_int();
@ -688,8 +701,8 @@ public:
Field *result_field; /* Save result here */
Item_result_field() :result_field(0) {}
// Constructor used for Item_sum/Item_cond_and/or (see Item comment)
Item_result_field(THD *thd, Item_result_field &item):
Item(thd, item), result_field(item.result_field)
Item_result_field(THD *thd, Item_result_field *item):
Item(thd, item), result_field(item->result_field)
{}
~Item_result_field() {} /* Required with gcc 2.95 */
Field *get_tmp_table_field() { return result_field; }
@ -710,18 +723,23 @@ class Item_ref :public Item_ident
public:
Field *result_field; /* Save result here */
Item **ref;
Item_ref(const char *db_par, const char *table_name_par,
const char *field_name_par)
:Item_ident(db_par,table_name_par,field_name_par),ref(0) {}
Item_ref(Item **item, const char *table_name_par, const char *field_name_par)
:Item_ident(NullS,table_name_par,field_name_par),ref(item) {}
Item **hook_ptr; /* These two to restore */
Item *orig_item; /* things in 'cleanup()' */
Item_ref(Item **hook, Item *original,const char *db_par,
const char *table_name_par, const char *field_name_par)
:Item_ident(db_par,table_name_par,field_name_par),ref(0), hook_ptr(hook),
orig_item(original) {}
Item_ref(Item **item, Item **hook,
const char *table_name_par, const char *field_name_par)
:Item_ident(NullS,table_name_par,field_name_par),
ref(item), hook_ptr(hook), orig_item(hook ? *hook:0) {}
// Constructor need to process subselect with temporary tables (see Item)
Item_ref(THD *thd, Item_ref &item)
:Item_ident(thd, item), ref(item.ref) {}
Item_ref(THD *thd, Item_ref *item, Item **hook)
:Item_ident(thd, item), ref(item->ref),
hook_ptr(hook), orig_item(hook ? *hook : 0) {}
enum Type type() const { return REF_ITEM; }
bool eq(const Item *item, bool binary_cmp) const
{ return ref && (*ref)->eq(item, binary_cmp); }
~Item_ref() { if (ref && (*ref) && (*ref) != this) delete *ref; }
double val()
{
double tmp=(*ref)->val_result();
@ -766,6 +784,7 @@ public:
}
Item *real_item() { return *ref; }
void print(String *str);
void cleanup();
};
class Item_in_subselect;
@ -776,7 +795,7 @@ protected:
public:
Item_ref_null_helper(Item_in_subselect* master, Item **item,
const char *table_name_par, const char *field_name_par):
Item_ref(item, table_name_par, field_name_par), owner(master) {}
Item_ref(item, NULL, table_name_par, field_name_par), owner(master) {}
double val();
longlong val_int();
String* val_str(String* s);
@ -840,7 +859,6 @@ public:
name=item->name;
cached_field_type= item->field_type();
}
~Item_copy_string() { delete item; }
enum Type type() const { return COPY_STR_ITEM; }
enum Item_result result_type () const { return STRING_RESULT; }
enum_field_types field_type() const { return cached_field_type; }
@ -997,13 +1015,15 @@ public:
void set_used_tables(table_map map) { used_table_map= map; }
virtual bool allocate(uint i) { return 0; };
virtual bool setup(Item *item) { example= item; return 0; };
virtual void store(Item *)= 0;
void set_len_n_dec(uint32 max_len, uint8 dec)
virtual bool setup(Item *item)
{
max_length= max_len;
decimals= dec;
}
example= item;
max_length= item->max_length;
decimals= item->decimals;
collation.set(item->collation);
return 0;
};
virtual void store(Item *)= 0;
enum Type type() const { return CACHE_ITEM; }
static Item_cache* get_cache(Item_result type);
table_map used_tables() const { return used_table_map; }
@ -1101,6 +1121,11 @@ public:
bool check_cols(uint c);
bool null_inside();
void bring_value();
void cleanup()
{
Item_cache::cleanup();
values= 0;
}
};
@ -1111,6 +1136,7 @@ class Item_type_holder: public Item
{
protected:
Item_result item_type;
Item_result orig_type;
Field *field_example;
public:
Item_type_holder(THD*, Item*);
@ -1122,6 +1148,11 @@ public:
String *val_str(String*);
bool join_types(THD *thd, Item *);
Field *example() { return field_example; }
void cleanup()
{
Item::cleanup();
item_type= orig_type;
}
};

100
sql/opt_range.cc
View File

@ -301,10 +301,11 @@ typedef struct st_qsel_param {
uint imerge_cost_buff_size; /* size of the buffer */
} PARAM;
static SEL_TREE * get_mm_parts(PARAM *param,Field *field,
static SEL_TREE * get_mm_parts(PARAM *param,COND *cond_func,Field *field,
Item_func::Functype type,Item *value,
Item_result cmp_type);
static SEL_ARG *get_mm_leaf(PARAM *param,Field *field,KEY_PART *key_part,
static SEL_ARG *get_mm_leaf(PARAM *param,COND *cond_func,Field *field,
KEY_PART *key_part,
Item_func::Functype type,Item *value);
static SEL_TREE *get_mm_tree(PARAM *param,COND *cond);
static ha_rows check_quick_select(PARAM *param,uint index,SEL_ARG *key_tree);
@ -612,14 +613,25 @@ SQL_SELECT::SQL_SELECT() :quick(0),cond(0),free_cond(0)
}
SQL_SELECT::~SQL_SELECT()
void SQL_SELECT::cleanup()
{
delete quick;
quick= 0;
if (free_cond)
{
free_cond=0;
delete cond;
cond= 0;
}
close_cached_file(&file);
}
SQL_SELECT::~SQL_SELECT()
{
cleanup();
}
#undef index // Fix for Unixware 7
QUICK_SELECT_I::QUICK_SELECT_I()
@ -1746,7 +1758,8 @@ static SEL_TREE *get_mm_tree(PARAM *param,COND *cond)
static SEL_TREE *
get_mm_parts(PARAM *param, Field *field, Item_func::Functype type,
get_mm_parts(PARAM *param, COND *cond_func, Field *field,
Item_func::Functype type,
Item *value, Item_result cmp_type)
{
DBUG_ENTER("get_mm_parts");
@ -1768,7 +1781,8 @@ get_mm_parts(PARAM *param, Field *field, Item_func::Functype type,
DBUG_RETURN(0); // OOM
if (!value || !(value->used_tables() & ~param->read_tables))
{
sel_arg=get_mm_leaf(param,key_part->field,key_part,type,value);
sel_arg=get_mm_leaf(param,cond_func,
key_part->field,key_part,type,value);
if (!sel_arg)
continue;
if (sel_arg->type == SEL_ARG::IMPOSSIBLE)
@ -1794,7 +1808,7 @@ get_mm_parts(PARAM *param, Field *field, Item_func::Functype type,
static SEL_ARG *
get_mm_leaf(PARAM *param, Field *field, KEY_PART *key_part,
get_mm_leaf(PARAM *param, COND *conf_func, Field *field, KEY_PART *key_part,
Item_func::Functype type,Item *value)
{
uint maybe_null=(uint) field->real_maybe_null(), copies;
@ -1803,6 +1817,32 @@ get_mm_leaf(PARAM *param, Field *field, KEY_PART *key_part,
char *str, *str2;
DBUG_ENTER("get_mm_leaf");
if (!value) // IS NULL or IS NOT NULL
{
if (field->table->outer_join) // Can't use a key on this
DBUG_RETURN(0);
if (!maybe_null) // Not null field
DBUG_RETURN(type == Item_func::ISNULL_FUNC ? &null_element : 0);
if (!(tree=new SEL_ARG(field,is_null_string,is_null_string)))
DBUG_RETURN(0); // out of memory
if (type == Item_func::ISNOTNULL_FUNC)
{
tree->min_flag=NEAR_MIN; /* IS NOT NULL -> X > NULL */
tree->max_flag=NO_MAX_RANGE;
}
DBUG_RETURN(tree);
}
/*
We can't use an index when comparing strings of
different collations
*/
if (field->result_type() == STRING_RESULT &&
value->result_type() == STRING_RESULT &&
key_part->image_type == Field::itRAW &&
((Field_str*)field)->charset() != conf_func->compare_collation())
DBUG_RETURN(0);
if (type == Item_func::LIKE_FUNC)
{
bool like_error;
@ -1866,22 +1906,6 @@ get_mm_leaf(PARAM *param, Field *field, KEY_PART *key_part,
DBUG_RETURN(new SEL_ARG(field,min_str,max_str));
}
if (!value) // IS NULL or IS NOT NULL
{
if (field->table->outer_join) // Can't use a key on this
DBUG_RETURN(0);
if (!maybe_null) // Not null field
DBUG_RETURN(type == Item_func::ISNULL_FUNC ? &null_element : 0);
if (!(tree=new SEL_ARG(field,is_null_string,is_null_string)))
DBUG_RETURN(0); // out of memory
if (type == Item_func::ISNOTNULL_FUNC)
{
tree->min_flag=NEAR_MIN; /* IS NOT NULL -> X > NULL */
tree->max_flag=NO_MAX_RANGE;
}
DBUG_RETURN(tree);
}
if (!field->optimize_range(param->real_keynr[key_part->key]) &&
type != Item_func::EQ_FUNC &&
type != Item_func::EQUAL_FUNC)
@ -3097,6 +3121,7 @@ check_quick_select(PARAM *param,uint idx,SEL_ARG *tree)
param->table->quick_rows[key]=records;
param->table->quick_key_parts[key]=param->max_key_part+1;
}
DBUG_PRINT("exit", ("Records: %lu", (ulong) records));
DBUG_RETURN(records);
}
@ -3440,7 +3465,29 @@ QUICK_RANGE_SELECT *get_quick_select_for_ref(THD *thd, TABLE *table,
key_part->part_length+=HA_KEY_BLOB_LENGTH;
key_part->null_bit= key_info->key_part[part].null_bit;
}
if (!insert_dynamic(&quick->ranges,(gptr)&range))
if (insert_dynamic(&quick->ranges,(gptr)&range))
goto err;
/*
Add a NULL range if REF_OR_NULL optimization is used.
For example:
if we have "WHERE A=2 OR A IS NULL" we created the (A=2) range above
and have ref->null_ref_key set. Will create a new NULL range here.
*/
if (ref->null_ref_key)
{
QUICK_RANGE *null_range;
*ref->null_ref_key= 1; // Set null byte then create a range
if (!(null_range= new QUICK_RANGE(ref->key_buff, ref->key_length,
ref->key_buff, ref->key_length,
EQ_RANGE)))
goto err;
*ref->null_ref_key= 0; // Clear null byte
if (insert_dynamic(&quick->ranges,(gptr)&null_range))
goto err;
}
return quick;
err:
@ -3584,12 +3631,7 @@ int QUICK_RANGE_SELECT::get_next()
int result;
if (range)
{ // Already read through key
/* result=((range->flag & EQ_RANGE) ?
file->index_next_same(record, (byte*) range->min_key,
range->min_length) :
file->index_next(record));
*/
result=((range->flag & (EQ_RANGE | GEOM_FLAG) ) ?
result=((range->flag & (EQ_RANGE | GEOM_FLAG)) ?
file->index_next_same(record, (byte*) range->min_key,
range->min_length) :
file->index_next(record));

169
sql/sql_select.cc
View File

@ -24,8 +24,6 @@
#include "mysql_priv.h"
#include "sql_select.h"
#include "opt_ft.h"
#include <m_ctype.h>
#include <hash.h>
#include <ft_global.h>
@ -89,7 +87,7 @@ static int do_select(JOIN *join,List<Item> *fields,TABLE *tmp_table,
Procedure *proc);
static int sub_select_cache(JOIN *join,JOIN_TAB *join_tab,bool end_of_records);
static int sub_select(JOIN *join,JOIN_TAB *join_tab,bool end_of_records);
static int flush_cached_records(JOIN *join,JOIN_TAB *join_tab,bool skipp_last);
static int flush_cached_records(JOIN *join,JOIN_TAB *join_tab,bool skip_last);
static int end_send(JOIN *join, JOIN_TAB *join_tab, bool end_of_records);
static int end_send_group(JOIN *join, JOIN_TAB *join_tab,bool end_of_records);
static int end_write(JOIN *join, JOIN_TAB *join_tab, bool end_of_records);
@ -182,7 +180,6 @@ int handle_select(THD *thd, LEX *lex, select_result *result)
register SELECT_LEX *select_lex = &lex->select_lex;
DBUG_ENTER("handle_select");
fix_tables_pointers(lex->all_selects_list);
if (select_lex->next_select())
res=mysql_union(thd, lex, result, &lex->unit);
else
@ -309,7 +306,7 @@ JOIN::prepare(Item ***rref_pointer_array,
/* Check that all tables, fields, conds and order are ok */
if (setup_tables(tables_list) ||
if (setup_tables(tables_list, 0) ||
setup_wild(thd, tables_list, fields_list, &all_fields, wild_num) ||
select_lex->setup_ref_array(thd, og_num) ||
setup_fields(thd, (*rref_pointer_array), tables_list, fields_list, 1,
@ -939,8 +936,10 @@ JOIN::optimize()
as in other cases the join is done before the sort.
*/
if (const_tables != tables &&
(order || group_list) && join_tab[const_tables].type != JT_ALL &&
(order || group_list) &&
join_tab[const_tables].type != JT_ALL &&
join_tab[const_tables].type != JT_FT &&
join_tab[const_tables].type != JT_REF_OR_NULL &&
(order && simple_order || group_list && simple_group))
{
if (add_ref_to_table_cond(thd,&join_tab[const_tables]))
@ -1094,7 +1093,7 @@ JOIN::reinit()
if (unit->select_limit_cnt == HA_POS_ERROR)
select_lex->options&= ~OPTION_FOUND_ROWS;
if (setup_tables(tables_list))
if (setup_tables(tables_list, 1))
DBUG_RETURN(1);
/* Reset of sum functions */
@ -1590,12 +1589,7 @@ JOIN::cleanup()
JOIN_TAB *tab, *end;
for (tab= join_tab, end= tab+tables ; tab != end ; tab++)
{
delete tab->select;
delete tab->quick;
tab->select=0;
tab->quick=0;
x_free(tab->cache.buff);
tab->cache.buff= 0;
tab->cleanup();
}
}
tmp_join->tmp_join= 0;
@ -1659,13 +1653,14 @@ mysql_select(THD *thd, Item ***rref_pointer_array,
goto err;
}
}
free_join= 0;
}
free_join= 0;
join->select_options= select_options;
}
else
{
join= new JOIN(thd, fields, select_options, result);
if (!(join= new JOIN(thd, fields, select_options, result)))
DBUG_RETURN(-1);
thd->proc_info="init";
thd->used_tables=0; // Updated by setup_fields
if (join->prepare(rref_pointer_array, tables, wild_num,
@ -1726,8 +1721,8 @@ static ha_rows get_quick_record_count(THD *thd, SQL_SELECT *select,
{
select->head=table;
table->reginfo.impossible_range=0;
if ((error=select->test_quick_select(thd, *(key_map *)keys,(table_map) 0,limit))
== 1)
if ((error=select->test_quick_select(thd, *(key_map *)keys,(table_map) 0,
limit)) == 1)
DBUG_RETURN(select->quick->records);
if (error == -1)
{
@ -2210,7 +2205,7 @@ merge_key_fields(KEY_FIELD *start,KEY_FIELD *new_fields,KEY_FIELD *end,
*/
static void
add_key_field(KEY_FIELD **key_fields,uint and_level,
add_key_field(KEY_FIELD **key_fields,uint and_level, COND *cond,
Field *field,bool eq_func,Item **value, uint num_values,
table_map usable_tables)
{
@ -2277,6 +2272,17 @@ add_key_field(KEY_FIELD **key_fields,uint and_level,
(*value)->result_type() != STRING_RESULT &&
field->cmp_type() != (*value)->result_type())
return;
/*
We can't use indexes if the effective collation
of the operation differ from the field collation.
*/
if (field->result_type() == STRING_RESULT &&
(*value)->result_type() == STRING_RESULT &&
field->cmp_type() == STRING_RESULT &&
((Field_str*)field)->charset() != cond->compare_collation())
return;
}
}
DBUG_ASSERT(num_values == 1);
@ -3441,7 +3447,7 @@ static bool create_ref_for_key(JOIN *join, JOIN_TAB *j, KEYUSE *org_keyuse,
{
/* Must read with repeat */
j->type= null_ref_key ? JT_REF_OR_NULL : JT_REF;
j->null_ref_key= null_ref_key;
j->ref.null_ref_key= null_ref_key;
}
else if (ref_key == j->ref.key_copy)
{
@ -3920,6 +3926,41 @@ bool error_if_full_join(JOIN *join)
}
/*
cleanup JOIN_TAB
SYNOPSIS
JOIN_TAB::cleanup()
*/
void JOIN_TAB::cleanup()
{
delete select;
select= 0;
delete quick;
quick= 0;
x_free(cache.buff);
cache.buff= 0;
if (table)
{
if (table->key_read)
{
table->key_read= 0;
table->file->extra(HA_EXTRA_NO_KEYREAD);
}
/* Don't free index if we are using read_record */
if (!read_record.table)
table->file->index_end();
/*
We need to reset this for next select
(Tested in part_of_refkey)
*/
table->reginfo.join_tab= 0;
}
end_read_record(&read_record);
}
/*
Free resources of given join
@ -3954,11 +3995,6 @@ JOIN::join_free(bool full)
{
if (tab->table)
{
if (tab->table->key_read)
{
tab->table->key_read= 0;
tab->table->file->extra(HA_EXTRA_NO_KEYREAD);
}
/* Don't free index if we are using read_record */
if (!tab->read_record.table)
tab->table->file->index_end();
@ -3969,29 +4005,7 @@ JOIN::join_free(bool full)
{
for (tab= join_tab, end= tab+tables; tab != end; tab++)
{
delete tab->select;
delete tab->quick;
tab->select=0;
tab->quick=0;
x_free(tab->cache.buff);
tab->cache.buff= 0;
if (tab->table)
{
if (tab->table->key_read)
{
tab->table->key_read= 0;
tab->table->file->extra(HA_EXTRA_NO_KEYREAD);
}
/* Don't free index if we are using read_record */
if (!tab->read_record.table)
tab->table->file->index_end();
/*
We need to reset this for next select
(Tested in part_of_refkey)
*/
tab->table->reginfo.join_tab= 0;
}
end_read_record(&tab->read_record);
tab->cleanup();
}
table= 0;
}
@ -5237,17 +5251,9 @@ remove_eq_conds(COND *cond,Item::cond_result *cond_value)
{
Item *new_item=remove_eq_conds(item,&tmp_cond_value);
if (!new_item)
{
#ifdef DELETE_ITEMS
delete item; // This may be shared
#endif
li.remove();
}
else if (item != new_item)
{
#ifdef DELETE_ITEMS
delete item; // This may be shared
#endif
VOID(li.replace(new_item));
should_fix_fields=1;
}
@ -6604,14 +6610,14 @@ sub_select(JOIN *join,JOIN_TAB *join_tab,bool end_of_records)
static int
flush_cached_records(JOIN *join,JOIN_TAB *join_tab,bool skipp_last)
flush_cached_records(JOIN *join,JOIN_TAB *join_tab,bool skip_last)
{
int error;
READ_RECORD *info;
if (!join_tab->cache.records)
return 0; /* Nothing to do */
if (skipp_last)
if (skip_last)
(void) store_record_in_cache(&join_tab->cache); // Must save this for later
if (join_tab->use_quick == 2)
{
@ -6645,21 +6651,21 @@ flush_cached_records(JOIN *join,JOIN_TAB *join_tab,bool skipp_last)
}
SQL_SELECT *select=join_tab->select;
if (!error && (!join_tab->cache.select ||
!join_tab->cache.select->skipp_record()))
!join_tab->cache.select->skip_record()))
{
uint i;
reset_cache(&join_tab->cache);
for (i=(join_tab->cache.records- (skipp_last ? 1 : 0)) ; i-- > 0 ;)
for (i=(join_tab->cache.records- (skip_last ? 1 : 0)) ; i-- > 0 ;)
{
read_cached_record(join_tab);
if (!select || !select->skipp_record())
if (!select || !select->skip_record())
if ((error=(join_tab->next_select)(join,join_tab+1,0)) < 0)
return error; /* purecov: inspected */
}
}
} while (!(error=info->read_record(info)));
if (skipp_last)
if (skip_last)
read_cached_record(join_tab); // Restore current record
reset_cache(&join_tab->cache);
join_tab->cache.records=0; join_tab->cache.ptr_record= (uint) ~0;
@ -7066,12 +7072,12 @@ join_read_always_key_or_null(JOIN_TAB *tab)
int res;
/* First read according to key which is NOT NULL */
*tab->null_ref_key=0;
*tab->ref.null_ref_key= 0; // Clear null byte
if ((res= join_read_always_key(tab)) >= 0)
return res;
/* Then read key with null value */
*tab->null_ref_key= 1;
*tab->ref.null_ref_key= 1; // Set null byte
return safe_index_read(tab);
}
@ -7085,10 +7091,10 @@ join_read_next_same_or_null(READ_RECORD *info)
JOIN_TAB *tab= info->table->reginfo.join_tab;
/* Test if we have already done a read after null key */
if (*tab->null_ref_key)
if (*tab->ref.null_ref_key)
return -1; // All keys read
*tab->null_ref_key= 1; // Read null key
return safe_index_read(tab);
*tab->ref.null_ref_key= 1; // Set null byte
return safe_index_read(tab); // then read null keys
}
@ -8061,8 +8067,9 @@ create_sort_index(THD *thd, JOIN *join, ORDER *order,
For impossible ranges (like when doing a lookup on NULL on a NOT NULL
field, quick will contain an empty record set.
*/
if (!(select->quick=get_ft_or_quick_select_for_ref(tab->join->thd,
table, tab)))
if (!(select->quick= tab->type == JT_FT ?
new FT_SELECT(thd, table, tab->ref.key) :
get_quick_select_for_ref(thd, table, &tab->ref)))
goto err;
}
}
@ -8070,9 +8077,12 @@ create_sort_index(THD *thd, JOIN *join, ORDER *order,
table->file->info(HA_STATUS_VARIABLE); // Get record count
table->sort.found_records=filesort(thd, table,sortorder, length,
select, filesort_limit, &examined_rows);
tab->records=table->sort.found_records; // For SQL_CALC_ROWS
delete select; // filesort did select
tab->select=0;
tab->records= table->sort.found_records; // For SQL_CALC_ROWS
if (select)
{
select->cleanup(); // filesort did select
tab->select= 0;
}
tab->select_cond=0;
tab->type=JT_ALL; // Read with normal read_record
tab->read_first_record= join_init_read_record;
@ -9155,7 +9165,7 @@ setup_copy_fields(THD *thd, TMP_TABLE_PARAM *param,
if (pos->type() == Item::FIELD_ITEM)
{
Item_field *item;
if (!(item= new Item_field(thd, *((Item_field*) pos))))
if (!(item= new Item_field(thd, ((Item_field*) pos))))
goto err;
pos= item;
if (item->field->flags & BLOB_FLAG)
@ -10056,20 +10066,23 @@ int mysql_explain_union(THD *thd, SELECT_LEX_UNIT *unit, select_result *result)
sl;
sl= sl->next_select())
{
// drop UNCACHEABLE_EXPLAIN, because it is for internal usage only
uint8 uncacheable= (sl->uncacheable & ~UNCACHEABLE_EXPLAIN);
res= mysql_explain_select(thd, sl,
(((&thd->lex->select_lex)==sl)?
((thd->lex->all_selects_list != sl)?"PRIMARY":
"SIMPLE"):
((thd->lex->all_selects_list != sl) ?
primary_key_name : "SIMPLE"):
((sl == first)?
((sl->linkage == DERIVED_TABLE_TYPE) ?
"DERIVED":
((sl->uncacheable & UNCACHEABLE_DEPENDENT)?
((uncacheable & UNCACHEABLE_DEPENDENT) ?
"DEPENDENT SUBQUERY":
(sl->uncacheable?"UNCACHEABLE SUBQUERY":
(uncacheable?"UNCACHEABLE SUBQUERY":
"SUBQUERY"))):
((sl->uncacheable & UNCACHEABLE_DEPENDENT)?
((uncacheable & UNCACHEABLE_DEPENDENT) ?
"DEPENDENT UNION":
sl->uncacheable?"UNCACHEABLE UNION":
uncacheable?"UNCACHEABLE UNION":
"UNION"))),
result);
if (res)